hello,,,finally got the old chaff 80 in my new house up and running after a new diverter valve and pcb,,,the system is absolutely full of crap so i intend to flush the rads one by one,,,my question is,,,is it best to take them outside and flush them through with a hose??? if i was to do this do i need to fit a connection onto the hose so it screws onto the rad connection to flush it through or just aim the water jet into the rad???,,,,,,or is it best to get two long lengths of hose and fit them to the rad while its still attached to the wall with the hose where all the crap comes out going outside into the drain or something???